NOW Foods BetterStevia Organic Zero-Calorie Liquid Sweetener, Keto Friendly, Suitable for Diabetics, No Erythritol, 8-Ounce

What's the difference in this stevia and Now's Original Stevia?

Does 4 drops really sweeten well? Thank you

Does the 2 oz. size come with a dropper? It is shown both with and without in the photos.

Does the Stevia in this product of the 'non-processed' type found in green leaf stevia, or does this product use a carcinogen like acetonitrile ?